Migrating from Bootstrap 2.3.2 to 3.0

Signed-off-by: Haoran <fanghaoran9054@gmail.com>
Bug fixed: modal are not cleared after closing

Signed-off-by: Haoran <fanghaoran9054@gmail.com>
Update button style to fit Bootstrap 3

Signed-off-by: Haoran <fanghaoran9054@gmail.com>
Rename Users::view action to Users::profile

Signed-off-by: Haoran <fanghaoran9054@gmail.com>
Update login page style

Signed-off-by: Haoran <fanghaoran9054@gmail.com>